PHL - IDA

$245 Find Cheap Flights from Philadelphia to Idaho Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Idaho Falls departing on 7/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Idaho Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Idaho Falls, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$309
Overall average: $943
Delta
Sat 4/18Sat 4/25
PHL - IDA • 1 stop
Cheapest one-way
$245
Alaska Airlines
Tue 7/21
PHL - IDA • 1 stop
Top airlines
Delta
Cheapest • from $309 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
May
Cheapest • 35% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Idaho Falls (PHL-IDA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Idaho Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Idaho Falls

Sat, Apr 18 - Sat, Apr 25
Delta Logo
6:05 pm - 10:40 pm
PHL
-
IDA
6h 35m
1 stop
Delta Logo
6:58 pm - 5:59 am
IDA
-
PHL
9h 01m
1 stop
$309Delta
Sat, Apr 18 - Sun, Apr 26
Delta Logo
6:05 pm - 10:40 pm
PHL
-
IDA
6h 35m
1 stop
Delta Logo
6:58 pm - 5:59 am
IDA
-
PHL
9h 01m
1 stop
$334Delta
Tue, Mar 3 - Sat, Mar 7
United Airlines Logo
8:02 am - 3:40 pm
PHL
-
IDA
9h 38m
2 stops
United Airlines Logo
6:36 am - 3:51 pm
IDA
-
PHL
7h 15m
1 stop
$364United Airlines
Tue, Mar 3 - Sat, Mar 7
United Airlines Logo
8:02 am - 3:40 pm
PHL
-
IDA
9h 38m
2 stops
United Airlines Logo
10:50 am - 12:16 am
IDA
-
PHL
11h 26m
2 stops
$369United Airlines
Wed, Apr 22 - Tue, Apr 28
Delta Logo
7:00 am - 12:26 pm
PHL
-
IDA
7h 26m
1 stop
Delta Logo
6:58 pm - 5:35 am
IDA
-
PHL
8h 37m
1 stop
$379Delta
Sat, Apr 18 - Sat, Apr 25
United Airlines Logo
6:17 am - 4:14 pm
PHL
-
IDA
11h 57m
2 stops
United Airlines Logo
2:30 pm - 11:43 pm
IDA
-
PHL
7h 13m
1 stop
$383United Airlines
Tue, Mar 3 - Sat, Mar 7
United Airlines Logo
3:37 pm - 8:58 pm
PHL
-
IDA
7h 21m
1 stop
United Airlines Logo
6:36 am - 3:51 pm
IDA
-
PHL
7h 15m
1 stop
$385United Airlines
Sat, May 2 - Thu, May 7
Delta Logo
6:05 pm - 10:40 pm
PHL
-
IDA
6h 35m
1 stop
Delta Logo
3:16 pm - 5:44 am
IDA
-
PHL
12h 28m
2 stops
$386Delta
Wed, Apr 22 - Tue, Apr 28
Alaska Airlines Logo
7:22 am - 3:29 pm
PHL
-
IDA
10h 07m
1 stop
Alaska Airlines Logo
4:06 pm - 6:02 am
IDA
-
PHL
11h 56m
1 stop
$399Alaska Airlines
Wed, Apr 22 - Tue, Apr 28
American Airlines Logo
1:47 pm - 11:39 pm
PHL
-
IDA
11h 52m
2 stops
American Airlines Logo
7:48 am - 10:24 pm
IDA
-
PHL
12h 36m
2 stops
$404American Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Idaho Falls flights

Get data-powered insights and trends into flights from Philadelphia to Idaho Falls to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Philadelphia to Idaho Falls?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Idaho Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Idaho Falls is May, where tickets cost $398 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $943 and $733 respectively.

Good to know

Low seasonJanuary
Cheapest flight$245
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Philadelphia to Idaho Falls

When to book flights from Philadelphia to Idaho Falls

Are your dates flexible? Find out the best times to travel from Philadelphia to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Idaho Falls

  • What is the cheapest flight from Philadelphia to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Philadelphia to Idaho Falls was $205 for a one-way ticket and $309 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Idaho Falls?

    A passport is not required to fly from Philadelphia to Idaho Falls.

  • Which aircraft models fly most regularly from Philadelphia to Idaho Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Idaho Falls?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Philadelphia and Idaho Falls, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Philadelphia to Idaho Falls, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Idaho Falls are Delta and United Airlines. With an average price for the route of $508 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $665 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Philadelphia to Idaho Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Idaho Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Idaho Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Idaho Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Idaho Falls with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and IDA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Idaho Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Idaho Falls from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Philadelphia to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Idaho Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Idaho Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8204 reviews
8.1Boarding
7.9Comfort
7.8Entertainment
8.5Crew
7.2Food
Airline reviews

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

10.0 ExcellentSoosnata, Feb 2026
LAX - HNL
Read more Delta reviews

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Good experience and the flight landed early. There was no food I had or entertainment.

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

Flight was delayed. No information on why it was delayed. After we boarded the flight, , the crew made announcement that the captain hs not arrived and he will take 15 mins more to arrive. Passengers were just sitting patiently for the captain to arrive and start, Terrible experience.

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

This was my first time flying Delta ever and I had a great experience!

Smallest leg room I've ever had on a plane.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Everything you need to know for your flight from Philadelphia to Idaho Falls

Information on your arrival and departure airports